package com.junlinpro.utils;

import java.io.FileOutputStream;
import java.io.IOException;
import java.nio.ByteBuffer;
import java.util.UUID;

import io.netty.util.ReferenceCountUtil;

public class WavSoundFileUtil {
	
 
    
    private static void toWavFile(byte[] bytes) throws IOException {
        String fileDic = "/mnt/audiofile/";
        String fileName = "realtime_"+UUID.randomUUID().toString()+".wav";
        String targetFile = fileDic+fileName;

        FileOutputStream fos = new FileOutputStream(targetFile);
        long size = bytes.length;
        int totalDataLen = new Long(size).intValue();
        int totalLen = new Long(size).intValue()+44;
        ByteBuffer buffer = ByteBuffer.allocate(new Long(size).intValue()+44);
        byte[] header = getHeader(totalDataLen, totalLen, 16000, 1, 16000 * 2);
        buffer.put(header);
        buffer.put(bytes);
        buffer.flip();
        
        byte[] data = new byte[totalLen];
        buffer.get(data);
        
        ReferenceCountUtil.release(buffer);// add by xiazq
        fos.write(data);
    }

    private static byte[] getHeader(long totalAudioLen,
                             long totalDataLen, long longSampleRate, int channels, long byteRate) {
        byte[] header = new byte[44];
        header[0] = 'R'; // RIFF/WAVE header
        header[1] = 'I';
        header[2] = 'F';
        header[3] = 'F';
        header[4] = (byte) (totalDataLen & 0xff);
        header[5] = (byte) ((totalDataLen >> 8) & 0xff);
        header[6] = (byte) ((totalDataLen >> 16) & 0xff);
        header[7] = (byte) ((totalDataLen >> 24) & 0xff);
        header[8] = 'W';
        header[9] = 'A';
        header[10] = 'V';
        header[11] = 'E';
        header[12] = 'f'; // 'fmt ' chunk
        header[13] = 'm';
        header[14] = 't';
        header[15] = ' ';
        header[16] = 16; // 4 bytes: size of 'fmt ' chunk
        header[17] = 0;
        header[18] = 0;
        header[19] = 0;
        header[20] = 1; // format = 1
        header[21] = 0;
        header[22] = (byte) channels;
        header[23] = 0;
        header[24] = (byte) (longSampleRate & 0xff);
        header[25] = (byte) ((longSampleRate >> 8) & 0xff);
        header[26] = (byte) ((longSampleRate >> 16) & 0xff);
        header[27] = (byte) ((longSampleRate >> 24) & 0xff);
        header[28] = (byte) (byteRate & 0xff);
        header[29] = (byte) ((byteRate >> 8) & 0xff);
        header[30] = (byte) ((byteRate >> 16) & 0xff);
        header[31] = (byte) ((byteRate >> 24) & 0xff);
        header[32] = (byte) (1 * 16 / 8); // block align
        header[33] = 0;
        header[34] = 16; // bits per sample
        header[35] = 0;
        header[36] = 'd';
        header[37] = 'a';
        header[38] = 't';
        header[39] = 'a';
        header[40] = (byte) (totalAudioLen & 0xff);
        header[41] = (byte) ((totalAudioLen >> 8) & 0xff);
        header[42] = (byte) ((totalAudioLen >> 16) & 0xff);
        header[43] = (byte) ((totalAudioLen >> 24) & 0xff);
        return header;
    }

}
